Furnace-grate.



No. 884,005. PATENTED APR. 7, 1908.

J. M. BLADES.

PURNAOB GRATE.

APPLICATION IILBD J N121 190s. A a SHEETS-SHEET 2.

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PATENTED APR. 7, 1908.

J. MQBLADES. FURNACE GRATE; APPLICATION FILED J AN. 27 1906.

3 SHEETS-SHEET 3.

. rjazmzji UNITED STATES PATENT OFFICE.

JOHN M. BLADES, OF ST. LOUIS, MISSOURI, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF ONE-HALF TO BENT GOODLOE AND ONE-HALF TO HART GOODLOE, BOTH OF ST. LOUIS,

MISSOURI.

FURNAGE-GRATE Specification of Letters Patent.

Patented April '7, 1908.

Application filed January;27,{1906. Serial No. 298,126.

My invention relates to a new and useful lmprovement in furnace grates and has for its objects first; to provide means whereby the bars of the grate may be moved toward or away from each other in order to regulate the air spaces or interstices between said bars to the desired degree to suit various conditions, such for instance, as whether fine or coarse fuelis used or whether the fire on the grate burns under a strong or weak draft. 1

Another ob'ect is to provide a novel means whereby the are may be shaken, the construction of the grate being suchthat either, or both, of the above mentioned manipulations can be made while fuel is burning on the grate.

Figure I is a top or plan view of my improved grate the clips and grate bars proper eing omitted in one portion to more clearly illustrate the parts beneath them. Fig. II is a vertical section taken on line IIII, Fig. I. Fig. III is a vertical transverse section taken on line III-III, Fig. I. Fig. IV is a pers ective view of one of the fuel supporting ciips of the grate bar. Fig. Vis a perspective view of one of the grate bar's, partly broken away, and one of the fuel supporting clips arranged thereon. Fig. VI is a perspective 'view of one of the throw bars, by which the rate bars are actuated. Fig. VII is an enarged top or plan view of a portion of my grate, partly broken away. Fig. VIII is a vlew similar to Fig. VII showing the grate;

bars in a differently adjusted position.

A designates a supporting frame which consists of a front wall 1, a rear wall 2, side walls 33, legs 4, and a transverse bar 5. This frame is provided with brackets 6, 7, 7 and 8, arranged upon the front wall, transversebar and rear wall respectively, the brackets 6 and 7, and 7 each other.

The construction of my improved grate is such that I might term it a double grate and 8 being disposed toward drawings, forming part of this specification.

' clips formed of a front section B and a rear section C, and insofar as the major details are concerned in the followin in the main, refer to t their singular number, i. e. I will describe but one section of the grate.

Slidably mounted upon the brackets 6 and 7 and held against lateral movement thereon by side flanges on said brackets, is arranged a reciprocatory bar 10, the ends of which are covered by suitable caps 11 which prevent said bar from becoming displaced, and also serve to prevent the deposit of fuel or other substance in said brackets to interfere with the operation of said bar 10.

The transverse bar 5 is provided with socket lugs 13 and 13 and the front and rear walls are provided with similar lugs 14 and 14, the former of which lugs are arranged adjacent to the side walls 33, while the latter lugs are arranged a greater distance .from said side walls. vThe lugs 13, 14 and 13', 14' support bearing bars 15, which serve as fulcrum members for a plurality of throw levers 16. (See Fig. 1). 1

The reciprocatory bar 10 is provided with longitudinal grooves 17 formed in its sides, and arranged within these grooves are pivot members 18,- which are designed to enter forks 19 at the inner ends of the throw levers 16.

The levers 16 are rovided adjacent to their outer ends with vertically disposed studs or pivot pins'20 which enter slots 21 formed in the grate bars proper 21, which are designed to rest and be slidably su ported on the side bars 33 of the frame 22- designates clips which are detachably arranged upon the grate bars proper, see Figs. V and V. These cli s each consist of a longitudinal body 23 w ich is provided with an inverted V-shaped groove formed in its lower face and which engage the upper V-shaped edge of the grate bars proper. Projectinglaterally from one side of the body 23 of the clips are fins 24 and arranged upon the opposite side of said body 23 and alternately disposed relative to the fins 24 are similar fins 25.

I prefer to form each entire grate bar out of a grate bar roper and a plurality of the clips 22 (eight eing shown in the drawings) and have provided means for locking said against longitudinal movement upon description I shall, e duplicate parts in the grate bars 21, which means consists in forming upon the said grate bars proper, lateral rejections 26 which fit between two of the aterally extending fins 24 or 25 of the outermost clips. By thus formin each entire grate bar I am enabled to reatIy prolong the life of the entire grate, in t at should any one clip become broken or badly burned I can simply remove that clip and insert a new one.

I will here state that the transverse bar 5 also acts as a grate bar proper to receive a register with or be brought into juxtaposition to the fire doors and ash pit doors of the furnace front.

Each reciprocatory bar 10 of each of the sections B and C of the grate is provided with ears 32 and 33, which are respectively engaged by levers 34 and 35, said levers being pivotally supported by lugs formed on the transverse bar 5 of the frame A. The ends of these levers 34 and 35, opposite to those which engage the reciprocatory 'bars 10, areconnected to links 36 and 37 respectively,l ass through suitable openings.

which links formed in t e front wall of the "frame A,

where they are-connected to levers 38 and 39. 3 When it is desired to shake either or both sections B and C of the grate, the shaking action is,accomplished by the manipulations crums of the other levers, and means for of the lever or levers 38 and 39.

When it is desired to move the grate bars toward or away from each other, in orderto regulate the size of the air spaces between them the lever orylevers 38-39 are moved forwardly or 'backwardly as the case requires, whereby through the instrumentality of the link or links, lever or levers, and reciprocatory 'bar or bars '10 connected thereto, the throw'levers 16 are moved in such manher as "to cause the grate bars proper 21 and their carried clips to be moved in one general direction, either forwardly or rearwardlyw For illustration, we will say that the ate bars are in the position shown in Fi s. Fand VII of the drawings, wherein the are are shown at their maximum degreeof separation. When it isdesi'red to dlminish the air spaces between the bars the levers 38 and 39 are manipulated in the proper direction, which as before stated moves all of the grate bars, in this instance, inwardly, and due to the differential fulcrum points of the levers 16 on the diagonally arranged bars 15 each grate bar is moved inwardly but to a degree different from the other bars, that is in a given length of time the grate bar nearest the center wall 5 moves a certain distance, the next grate bar adjacent thereto moves a greater distance, and so on throughout the entire number of grate bars, the next adjacent grate bar to the one previously considered moves an increased distance. This adjustment can be made until the minimum size of the air space is reached, which position is illustrated in Fig. VIII of the drawing. It will be readily understood that the actuation of the grate bars to attain reverse adjustments of them, or the greater separation of the bars, is accomplished by moving the reciprocatory bar 10 in a direction opposite to that in which it was previously moved, whereby the throw levers are swung reversely, but move in the same degrees relative to each other as a consequence of which the grate bars are brought more closely assembled and the spaces between them decreased.

I claim as my invention:

1. A grate consisting of a frame, a lurality of grate bars, throw levers pivotal y connected to said grate bars, a su port for all of said throw levers, each of said throw levers being fulcrumed to said'support at adistance from one of its ends different from the ful-' crums of the other levers, and means for moving all of said throw levers, substantially as set forth.

2. A grateconsisting of a frame, a plurality of movable grate bars, clips carried by said grate bars, throw levers pivotally connected to said grate bars, a su port for all of said throw levers, each of said throw levers being fulcrumed to said support at a distance from one of its ends different from the fulmovinall of said throw levers, substantially as set orth.

3. A grate consisting of a frame, grate bars slidabl mounted on said frame, throw levers pivota ly attached to said grate bars, a support for said throw levers and upon which they are'fulcru'med, the fulcrum'po'mt-ofeach throw lever being at a distance from one of its ends different from the fulcrums of the other levers, and means for moving all of said terstices between said tially as set forth.

5. A grate consisting of a frame, a plurality of movable grate bars, clips carried by said grate bars, throw levers pivotally connected to said grate bars, a support for said throw levers, each of said throw levers being fulcrumed in said support at a distance from one of its ends different from the fulcrums of the other levers, and a slidable bar mounted on said frame for cooperation with said levers for moving them simultaneously to increase or diminish the interstices between said grate bars, substantially as set forth.

6. A grate consisting of a frame, grate bars slidably mounted on said frame, throw levers pivotally attached to said rate bars, a support for each of said throw evers and to which they are fulcrumed, the fulcrum oint of each throw lever being at a distance rom one of its ends different from the fulcrums of the other levers, and a slidable bar mounted on said frame for cooperation with said throw levers for moving them simultaneously to increase ordiminish the interstices between said grate bars, substantially as set forth.

7. A grate consisting of a frame, grate bars slidably mounted thereon, a plurality of clips .mounted oiizeach of said grate bars, throw levers 'connected to each of said grate barsya', su port for all of said throw levers grate bars, substanand to w ich said throw levers are ful-' 'crumedjthe'fulcrum point of the two outermost throw levers being at diflerent distances from the ends of said levers, while the fulcrum points of the throw levers arran ed therebetween are in alinement with the ulcrum points of said outermost levers; a slide bar which 006 erates with said throw levers, and means or operating said slide bar whereby the interstices between the grate bars can be increased or diminished, substantially as set forth.

8. A grate consisting of a frame, grate bars slidably mounted thereon, a plurality of clips mounted on each of said grate bars, a throw lever connected to each of said grate bars, a su port for all of said throw levers and to w ich said throw levers are fulcrumed; the fulcrum points of the two outermost throw levers being at different distances from the ends of said levers, while the ful crum points of the throw levers arran ed therebetween are in alinement with the ulcrum points of said outermost throw levers; a slide bar which cooperates with said throw levers, marginal grate bars supported by said frame and overlapping said rst mentioned rate bars and. their carried clips, and means or operating said slide bar whereby the interst1ces between'the grate bars can be increased or diminished, substantially as set forth.

JOHN M. BLADES. In presence of- E. S. KNIGHT, WM. H. Soo'rT. 

